The panel choosing the next archbishop of Canterbury is rumoured to be deadlocked after meeting in secrecy for three days last week.

The lack of a clear winner so far has led to speculation that the original frontrunner, the archbishop of York, John Sentamu, has divided the Crown Nominations Commission, and that he may even be out of the race.

Reports indicated that the 16-strong panel may also have ruled out the bishop of London, the Rt Rev Richard Chartres.

It is understood the panel will be holding a further session, indicating it has been unable to agree on a candidate.

Other frontrunners in contention are the bishop of Durham, Justin Welby, and the bishop of Norwich, Graham James.

The Church of England refused to comment on speculation about any candidates or the deliberations of the commission. A spokesman for Sentamu, who has been tipped to become the first black archbishop of Canterbury, also refused to comment on the reports.

Sources told the Sunday Times Sentamu was seen by some members of the panel as too divisive, and that there was resentment over his conservative stance on homosexuality and his opposition to clergy becoming bishops if they are divorced or married to divorcees.

Chartres was reportedly facing opposition from representatives of the Canterbury diocese over his refusal to ordain women.

The Mail on Sunday reported sources as saying that though Sentamu was a popular and charismatic leader, he may lack the necessary diplomatic skills for Lambeth Palace.

Traditionally, candidates do not know they are being considered for the post, but this time they have been interviewed and made aware of the shortlist.

The panel is given the task of selecting a preferred candidate and a runner-up, whose names will be sent to the prime minister and the Queen before any appointment is made.

Welby, 56, was appointed bishop last year and may be regarded by some as inexperienced, while James, 61, was quoted last week as saying the job was suited to "a lot younger man than me".

Williams has warned that any successor would need "the constitution of an ox and skin of a rhinoceros".